On Drop Rate
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About On Drop Rate

On Drop Rate helps you check roughly how long you'd need to grind for an item, and whether you're actually dry right now, or just feeling like it.

We're passionate OSRS players, grinding since the game's 2013 release across multiple accounts and every seasonal game mode along the way.

This vibe-coded project is built and maintained by us.

Greetings from Team On Drop Rate.

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This policy may be updated occasionally as the site changes.

← All bosses
Blue Moon
Blue Moon
Kills per hour modifier
kills/hour

The Blue moon spear takes about
24 hours and 53 minutes to obtain if you are exactly on droprate.

Assuming you are killing all 3 the bosses

Expected kills
224
Expected kills on drop rate
Expected time to obtain
24h 53m
at 9 kills/hour (average)

The time to obtain Blue moon spear at Blue Moon, if you are exactly on drop rate, will be 37 hours and 20 minutes with beginner gear, 24 hours and 53 minutes with average gear and 22 hours and 24 minutes in max gear. That is about 224 kills on average.

Customize your estimated kills per hour above to see your own time to be on drop rate.

Additional information

During this grind you will also be making roughly 16,571,972 gp in total loot — about 665,838 gp per hour at 9 kills per hour. The biggest earner over that stretch is Blue moon tassets at about 4,082,938 gp.

Each kill has a 0.4464% chance at Blue moon spear. Half of all players get it within 155 kills, 515 kills covers 90%, and 1,030 kills covers 99% — so going past 224 kills without one is unlucky, but not unusual.

Loot values use live Grand Exchange prices and shift with the market.

Loot from 224 kills

Loading prices…
Item Quantity Price (ea) Total value
Total loot value—

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